US gun rights advocates have signed a White House petition calling for British CNN host Piers Morgan to be deported for allegedly attacking the Second Amendment rights of ordinary Americans.

The outspoken former British tabloid editor has launched something of a personal crusade for greater gun control measures in the wake of the December 14 massacre at Sandy Hook elementary in Newtown, Connecticut.

Morgan held an especially contentious interview with executive director of Gun Owners of America Larry Pratt, appearing to become incensed and incredulous when Pratt suggested more, not fewer, weapons as the solution.